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/*
* ngtcp2
*
* Copyright (c) 2017 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_idtr.h"
#include <assert.h>
void ngtcp2_idtr_init(ngtcp2_idtr *idtr, int server, const ngtcp2_mem *mem) {
ngtcp2_gaptr_init(&idtr->gap, mem);
idtr->server = server;
}
void ngtcp2_idtr_free(ngtcp2_idtr *idtr) {
if (idtr == NULL) {
return;
}
ngtcp2_gaptr_free(&idtr->gap);
}
/*
* id_from_stream_id translates |stream_id| to id space used by
* ngtcp2_idtr.
*/
static uint64_t id_from_stream_id(int64_t stream_id) {
return (uint64_t)(stream_id >> 2);
}
int ngtcp2_idtr_open(ngtcp2_idtr *idtr, int64_t stream_id) {
uint64_t q;
assert((idtr->server && (stream_id % 2)) ||
(!idtr->server && (stream_id % 2)) == 0);
q = id_from_stream_id(stream_id);
if (ngtcp2_gaptr_is_pushed(&idtr->gap, q, 1)) {
return NGTCP2_ERR_STREAM_IN_USE;
}
return ngtcp2_gaptr_push(&idtr->gap, q, 1);
}
int ngtcp2_idtr_is_open(ngtcp2_idtr *idtr, int64_t stream_id) {
uint64_t q;
assert((idtr->server && (stream_id % 2)) ||
(!idtr->server && (stream_id % 2)) == 0);
q = id_from_stream_id(stream_id);
return ngtcp2_gaptr_is_pushed(&idtr->gap, q, 1);
}
uint64_t ngtcp2_idtr_first_gap(ngtcp2_idtr *idtr) {
return ngtcp2_gaptr_first_gap_offset(&idtr->gap);
}
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